Display device

ABSTRACT

A display device comprises a first substrate including a first top portion, a first sidewall portion and a first bent portion, a second substrate including a second top portion, a second sidewall portion and a second bent portion, a display element and a packaging material. The first bent portion is disposed between the first top portion and the first sidewall portion. The second substrate is separated from the first substrate by a predetermined distance to form an accommodating space. The second top portion is disposed corresponding to the first top portion. The second bent portion is disposed between the second top portion and the second sidewall portion. The display element is disposed in the accommodating space. The packaging material is disposed in the accommodating space and corresponding to the first sidewall portion and the second sidewall portion.

CROSS REFERENCE TO RELATED APPLICATIONS

This Non-provisional application claims priority under 35 U.S.C. §119(a)on Patent Application No(s). 103134450 filed in Taiwan, Republic ofChina on Oct. 2, 2014, the entire contents of which are herebyincorporated by reference.

BACKGROUND OF THE INVENTION

1. Field of Invention

This invention relates to a display device.

2. Related Art

Common display devices encompass liquid crystal display (LCD) devices,electrophoretic display devices, organic light emitting diode (OLED)display devices, etc. Generally, the display device mainly includes adisplay medium (including an LCD, an electrophoretic display or an OLEDdisplay), a substrate and a protection cover, wherein the display isdisposed between the substrate and the protection cover. Moreover, acommon anti-water/oxygen design in the display device is to dispose adam seal around the edges of the protection cover and substrate forconnecting and sealing the protection cover and substrate, so that thewater/oxygen of the environment can be prevented from permeating thedisplay device through the joint between the protection cover and thesubstrate and the accompanying damage can be thus avoided. However, theabove design is unfavorable to the increasingly raised demand for thelightness, thinness and having a larger display area to show a largerimage, because the border of the display device will be enlarged, andtherefore the display area will be reduced and the appearance of thedisplay device will be unpleasing to the eye.

Although the industry has developed a filling material which is used tocomprehensively seal the substrate and the protection cover and coversthe display for preventing the water/oxygen from the display, thewater/oxygen still can permeate through the joint between the substrateand the protection cover.

Therefore, it is an important subject to provide a display device havinga better anti-water/oxygen effect and a narrower border area.

SUMMARY OF THE INVENTION

In view of the foregoing subject, an objective is to provide a displaydevice which is designed novelly to have a better anti-water/oxygeneffect and also include a narrower border area.

To achieve the above objective, a display device comprises a firstsubstrate, a second substrate, a display element and a packagingmaterial. The first substrate includes a first top portion, a firstsidewall portion and a first bent portion. The first bent portion isextended from an edge of the first top portion and disposed between andconnecting the first top portion and the first sidewall portion. Thesecond substrate is separated from the first substrate by apredetermined distance to form an accommodating space and includes asecond top portion, a second sidewall portion and a second bent portion.The second top portion is disposed corresponding to the first topportion. The second bent portion is extended from an edge of the secondtop portion and disposed between and connecting the second top portionand the second sidewall portion. The display element is disposed in theaccommodating space. The packaging material is disposed in theaccommodating space and corresponding to the first sidewall portion andthe second sidewall portion.

In one embodiment, the packaging material is disposed around the displayelement.

In one embodiment, the first substrate further includes a firstextension portion connected to the first sidewall portion, and thesecond substrate further includes a second extension portion connectedto the second sidewall portion and disposed corresponding to the firstextension portion, and the first extension portion and the secondextension portion are extended along a direction parallel to the firsttop portion.

In one embodiment, the first extension portion is extended to anotheredge of the first top portion, and the second extension portion isextended to another edge of the second top potion.

In one embodiment, the length of the second sidewall portion is in arange between 1 mm and 20 mm.

In one embodiment, the display device further comprises a third bentportion and a fourth bent portion. The third bent portion is extendedfrom the first sidewall portion and disposed between the first sidewallportion and the first extension portion. The fourth bent portion isextended from the second sidewall portion and disposed between thesecond sidewall portion and the second extension portion.

In one embodiment, the packaging material includes a first packagingmaterial and a second packaging material, the extensibility of the firstpackaging material is greater than that of the second packagingmaterial, the first packaging material is disposed in the accommodatingspace corresponding to the first bent portion, the first sidewallportion, the third bent portion, the second bent portion, the secondsidewall portion and the fourth bent portion, and the second packagingmaterial is disposed in the accommodating space corresponding to thefirst extension portion and the second extension portion.

In one embodiment, the display device further comprises a third bentportion, a fourth bent portion, a fifth bent portion and a sixth bentportion. The third bent portion is extended from the first sidewallportion. The fourth bent portion is extended from the second sidewallportion. The fifth bent portion is extended from the third bent portion.The sixth bent portion is extended from the fourth bent portion. Thethird bent portion and the fifth bent portion are disposed between thefirst sidewall portion and the first extension portion, and the fourthbent portion and the sixth bent portion are disposed between the secondsidewall portion and the second extension portion.

In one embodiment, the first top portion and the second top portion arecurved structures.

In one embodiment, the curvature radiuses of the first top portion andsecond top portion are in a range between 10 mm and 1000 mm.

As mentioned above, in the display device of this invention, the firstbent portion is formed between the first top portion and the firstsidewall portion and the second bent portion is formed between thesecond top portion and the second sidewall portion, and that is, thefirst bent portion and the second bent portion collectively form thebent structure. Thereby, the path of the water/oxygen of the environmentpermeating the accommodating space can be elongated, and that is, thetime of the water/oxygen of the environment contacting the displayelement can be delayed, so as to prevent the display element from beingaffected by the water/oxygen and damaged and thus to achieve theanti-water/oxygen effect. Besides, through the design of the first bentportion and the second bent portion, the width of the border of thedisplay device can be reduced and the effect of a narrow border regioncan be provided.

Furthermore, through the design of the first bent portion and the secondbent portion, the anti-water/oxygen effect of a certain degree can beachieved when the packaging material is just disposed in theaccommodating space and corresponding to the first sidewall portion andthe second sidewall portion. Therefore, the packaging material can besaved.

BRIEF DESCRIPTION OF THE DRAWINGS

Those embodiments will become more fully understood from the detaileddescription and accompanying drawings, which are given for illustrationonly, and thus are not limitative of the present invention, and wherein:

FIG. 1 is a schematic sectional diagram of a display device of anembodiment of the invention;

FIG. 2 is a schematic sectional diagram of a display device of anotherembodiment of the invention;

FIG. 3 is a schematic sectional diagram of a display device of anotherembodiment of the invention;

FIG. 4 is a schematic sectional diagram of a display device of anotherembodiment of the invention;

FIG. 5A is a schematic sectional diagram of a display device of anotherembodiment of the invention;

FIG. 5B is a schematic diagram of an application of the display devicein FIG. 5A;

FIG. 6A is a schematic sectional diagram of a display device of anotherembodiment of the invention; and

FIG. 6B is a schematic diagram of another embodiment of the displaydevice in FIG. 6A.

DETAILED DESCRIPTION OF THE INVENTION

The present invention will be apparent from the following detaileddescription, which proceeds with reference to the accompanying drawings,wherein the same references relate to the same elements.

FIG. 1 is a schematic sectional diagram of a display device 1 of anembodiment of the invention. As shown in FIG. 1, in this embodiment, thedisplay device 1 is, for example but not limited to, an LCD device, anLED display device, an OLED display device or an electrophoretic displaydevice.

The display device 1 of this embodiment includes a first substrate 1, asecond substrate 12, a display element 13 and a packaging material 14.The first substrate 11 and the second substrate 12 are separated fromeach other by a predetermined distance D to form an accommodating spaceS, and the display element 13 is disposed in the accommodating space S.The display element 13 of this embodiment, according to the type of theabove-mentioned display device 1, can be an LCD panel, an LED displaypanel, an OLED display panel or an electrophoretic display panel, andthe OLED display panel will be illustrated as an example below. Thefirst substrate 11 can be a protection cover disposed on a side of thedisplay element 13 and the second substrate 12 can be a substrate of thedisplay element 13. Of course, in other embodiments, the first substrate11 can be the substrate of the display element 13 and the secondsubstrate 12 can be the protection cover.

The first substrate 11 of this embodiment includes a first top portion111, a first sidewall portion 112 and a first bent portion 113. Thefirst top portion 111 is extended along a first direction X, the firstsidewall portion 112 is extended along a second direction Y, and thefirst bent portion 113 is bent from the first direction X to the seconddirection Y so that the first substrate 11 is bent at the joint betweenthe first top portion 111 and the first sidewall portion 112. In otherwords, the first bent portion 113 is extended from an edge of the firsttop portion 111 and disposed between and connecting the first topportion 111 and the first sidewall portion 112. The second substrate 12also includes a second top portion 121, a second sidewall portion 122and a second bent portion 123. Likewise, the second top portion 121 isextended along the first direction X, the second sidewall portion 122 isextended along the second direction Y, and the second bent portion 123is bent from the first direction X to the second direction Y and betweenthe second top portion 121 and the second sidewall portion 122. In otherwords, the second bent portion 123 is extended from an edge of thesecond top portion 121 and disposed between and connecting the secondtop portion 121 and the second sidewall portion 122. Since the secondtop portion 121 is disposed corresponding to the first top portion 111and the second sidewall portion 122 is disposed corresponding to thefirst sidewall portion 112, the first bent portion 113 and the secondbent portion 123 are both formed into a bent structure.

In detail, the first substrate 11 and the second substrate 12 areseparated from each other by a predetermined distance D and disposedoppositely to form the accommodating space S, and favorably, thepredetermined distance D can be in a range between 0.1 μm and 5 mm sothat the display element 13 is disposed in the accommodating space S andbetween the first top portion 111 and the second top portion 121. Thepackaging material 14 of this embodiment is disposed in theaccommodating space S and corresponding to the first sidewall portion112 and second sidewall portion 122, and the packaging material 14 isdisposed around the display element 13 to seal the edge of theaccommodating space S, so that the display element 13 is disposed in thesealed accommodating space S. The thickness of the display device 1,i.e. the whole thickness of the first substrate 11, second substrate 12and accommodating space, can be in a range between 0.5 μm and 50 μm. Thepackaging material 14 of this embodiment can be seal, and can beselected from the group of acrylic thermocuring material, acrylicphotocuring material, epoxy resin thermocuring material, epoxy resinphotocuring material, silicon thermocuring material, silicon photocuringmaterial and their any mixture. The packaging material 14 is disposedbetween the first sidewall portion 112 and the second sidewall portion122 and around the display element 13, so as to prevent the water/oxygenof the environment from permeating the accommodating space S through theedges of the first substrate 11 and second substrate 12 and thus achievethe anti-water/oxygen effect.

Besides, this embodiment can reduce the width of the border of thedisplay device 1 by the design of the first bent portion 113 and secondbent portion 123, so as to achieve the effect of a narrower border area.Furthermore, through the design of the first bent portion 113 and secondbent portion 123, the anti-water/oxygen effect of a certain degree canbe achieved when the packaging material 14 is just disposed in theaccommodating space S and corresponding to the first sidewall portion112 and second sidewall portion 122, and therefore the packagingmaterial 14 can be saved. Of course, in other embodiments, for a betteranti-water/oxygen effect, the packaging material 14 may be filled intothe accommodating space S, i.e. the whole accommodating space S.

FIG. 2 is a schematic sectional diagram of a display device 2 of anotherembodiment of the invention. As shown in FIG. 2, the first substrate 21of the display device 2 of this embodiment further includes a firstextension portion 214. The first extension portion 214 is connected tothe first sidewall portion 212 and along the first direction X andtherefore formed on a side of the first top portion 211. Physically, inthis embodiment, the surface of the first top portion 211 correspondingto the accommodating space S is called the bottom surface B and thefirst extension portion 214 is formed on the side of the bottom surfaceB of the first top portion 211. Likewise, the second substrate 22further includes at least a second extension portion 224. The secondextension portion 224 is connected to the second sidewall portion 222and disposed corresponding to the first extension portion 214. In thisembodiment, the first extension portion 214 is extended to another edgeof the first top portion 211 and the second extension portion 224 isextended to another edge of the second top potion 221, and the firstextension portion 214 and the second extension portion 224 are extendedalong a direction parallel to the first top portion 211, i.e. the firstdirection X herein. Moreover, the second extension portion 224 and thefirst extension portion 214 are disposed on the side of the bottomsurface B of the first top portion 211 together. A third bent portion215 can be formed between the first sidewall portion 212 and the firstextension portion 214 and is bent from the second direction Y to thefirst direction X. A fourth bent portion 225 can be formed between thesecond sidewall portion 222 and the second extension portion 224 and isbent from the second direction Y to the first direction X.

In other words, the display device 2 of this embodiment further includesthe third bent portion 215 and the fourth bent portion 225. The thirdbent portion 215 is extended from the first sidewall portion 212 anddisposed between the first sidewall portion 212 and the first extensionportion 214. The fourth bent portion 225 is extended from the secondsidewall portion 222 and disposed between the second sidewall portion222 and the second extension portion 224. The display device 2 of thisembodiment includes the first bent portion 213, the second bent portion223, the third bent portion 215 and the fourth bent portion 225, so thatthe first extension portion 214 and the second extension portion 224 areformed on the side of the bottom surface B of the first top portion 211.Therefore, the width of the border of the display device 2 can bereduced and the path for the water/oxygen permeating the display device2 can be elongated.

In this embodiment, the packaging material 24 is filled into theaccommodating space S, i.e. the whole accommodating space S, to coverthe display element 23. Of course, in other embodiments, the packagingmaterial 24 may be disposed in the accommodating space S andcorresponding to the first bent portion 213 and second bent portion 223or to the third bent portion 215 and fourth bent portion 225, and theanti-water/oxygen effect of a certain degree also can be achievedthereby.

In this embodiment, because the display device 2 includes the first bentportion 213, the second bent portion 223, the third bent portion 215 andthe fourth bent portion 225, the path for the water/oxygen of theenvironment permeating the accommodating space S can be elongated.Physically, the water/oxygen will not cause the damage to the displayelement 23 until passing through between the third bent portion 215 andthe fourth bent portion 225 and then through between the first bentportion 213 and the second bent portion 223, so a betteranti-water/oxygen effect can be provided thereby. As mentioned above,the third bent portion 215 and the fourth bent portion 225 can be formedinto a right angle favorably, so that the water/oxygen can be gatheredat the right angle region when entering into between the first substrate21 and the second substrate 22, so as to achieve a betteranti-water/oxygen effect. Of course, in other embodiments, the thirdbent portion 215 and the fourth bent portion 225 may be formed into acurved angle, and the anti-water/oxygen effect also can be achievedthereby.

FIG. 3 is a schematic sectional diagram of a display device 3 of anotherembodiment of the invention. As shown in FIG. 3, in an embodiment, thefirst extension portion 314 and the second extension portion 324 can beextended to form a plurality of bent structures, so as to intensify theanti-water/oxygen effect. Physically, the display device 3 of thisembodiment further includes a fifth bent portion 316 and a sixth bentportion 326. The fifth bent portion 316 is extended from the third bentportion 315 and disposed between the third bent portion 315 and thefirst extension portion 314. The sixth bent portion 326 is extended fromthe fourth bent portion 325 and disposed between the fourth bent portion325 and the second extension portion 324. In this embodiment, the thirdbent portion 315 and the fifth bent portion 316 are disposed between thefirst sidewall portion 312 and the first extension portion 314, and thefourth bent portion 325 and the sixth bent portion 326 are disposedbetween the second sidewall portion 322 and the second extension portion324. By taking the first extension portion 314 as an example, the firstextension portion 314 of this embodiment is extended from the fifth bentportion 316, then extended along the direction parallel to the firstsidewall portion 312 and then extended away from the central part of thefirst top portion 311. Likewise, the second extension portion 324 isextended from the sixth bent portion 326 in the same bent manner, whichis shown as the arrows in FIG. 3. In other words, each of the fifth bentportion 316 and the sixth bent portion 326 is formed into a U-shapestructure, which is disposed on the side of the bottom surface B of thefirst top portion 311. In other embodiments, the first extension portion314 or the second extension portion 324 can be extended to introducemore bent structures and a better anti-water/oxygen effect can beachieved thereby.

In this embodiment, the fifth bent portion 325 and the sixth bentportion 326 are both disposed on the side of the bottom surface B of thefirst top portion 311. In other words, the structures of the firstextension portion 314 and second extension portion 324 are both disposedon the side of the bottom surface B of the first top portion 311, andthereby the width of the border of the display device 3 can be reducedand the border area can be narrowed. No matter how the first extensionportion 314 and the second extension portion 324 are bent, they aredisposed on the side of the bottom surface B of the first top portion311 to bring the effect of narrow border.

FIG. 4 is a schematic sectional diagram of a display device 4 of anotherembodiment of the invention. As shown in FIG. 4, in an embodiment, theaccommodating space S can be filled with different packaging materials,such as the first packaging material 44 a and the second packagingmaterial 44 b included by the packaging material of this embodiment.Physically, the first packaging material 44 a and the second packagingmaterial 44 b are seal and can be selected from the group of pressuredependant adhesive material, epoxy resin adhesive material, siliconadhesive material and their any mixture. The extensibility of the firstpackaging material 44 a is greater than that of the second packagingmaterial 44 b, and the anti-water/oxygen ability of the second packagingmaterial 44 b is greater than that of the first packaging material 44 a.The first packaging material 44 a of this embodiment is disposed in theaccommodating space S and corresponding to the first bent portion 314,the first sidewall portion 412, the third bent portion 415, the secondbent portion 423, the second sidewall portion 422 and the fourth bentportion 425. The second packaging material 44 b of this embodiment isdisposed in the accommodating space S and corresponding to the firstextension portion 414 and the second extension portion 424. In otherembodiments, the first packaging material 44 a or the second packagingmaterial 44 b may be also disposed between the first top portion 411 andthe second top portion 421, so as to intensify the anti-water/oxygeneffect for protecting the display element 43. In other words, in thisembodiment, the first packaging material 44 a of higher extensibility isfilled into the accommodating space S of the bent structures (such asthe first bent portion 413, the second bent portion 423, the third bentportion 415 and the fourth bent portion 425) while the second packagingmaterial 44 b is filled into the accommodating space S of the relativelyflat structure (such as the first extension portion 414 and the secondextension portion 424).

Of course, when the first extension portion 414 and the second extensionportion 424 form a plurality of bent structures (referring to FIG. 3),the first packaging material 44 a may be disposed between the fifth bentportion 316 and the sixth bent portion 326 as shown in FIG. 3 and thesecond packaging material 44 b may be disposed at the relatively flatstructure.

FIG. 5A is a schematic sectional diagram of a display device 5 ofanother embodiment of the invention. As shown in FIG. 5A, in anembodiment, the length L of the second sidewall portion 522 can beincreased, and that is, the distance between the first bent portion 513and the third bent portion 515 and the distance between the second bentportion 523 and the fourth bent portion 525 become longer. Favorably,the length L of the second sidewall portion 522 can be in a rangebetween 1 mm and 20 mm. The length L of the second sidewall portion 522in this embodiment means the distance from the side of the second topportion 521 away from the accommodating space S to the side of thesecond extension portion 524 closer to the accommodating space S, asshown in FIG. 5. Through this kind of design, the second top portion521, the second sidewall portion 522 and the second extension portion524 can become a structure which is disposed on the opposite side of theaccommodating space S and can clip something. FIG. 5B is a schematicdiagram of an application of the display device 5 in FIG. 5A. As shownin FIG. 5B, the display device 5 of this embodiment can be disposed to abacklight module or a circuit board PCB, and the circuit board PCB isgiven as an example. The thickness of the circuit board PCB is less thanthe length L of the second sidewall portion 522, so that the circuitboard PCB can be accommodated on the side of the second top portion 521,second sidewall portion 522 and second extension portion 524 oppositethe accommodating space S. Therefore, by increasing the length L of thesecond sidewall portion 522 of the display device 5 of this embodiment,the circuit board PCB or the backlight module can be disposed among thesecond top portion 521, the second sidewall portion 522 and the secondextension portion 524, so as to save the space for the disposition.

FIG. 6A is a schematic sectional diagram of a display device 6 ofanother embodiment of the invention. As shown in FIG. 6A, in anembodiment, the first top portion 611 and the second top portion 621 canbe made a curved structure so that the display element 63 can be appliedto a curved tablet computer. The center of the circle of the curvedstructure of the first top portion 611 and second top portion 621 ofthis embodiment is located on the side of the bottom surface B of thefirst top portion 611, so that the curved structure is curved towardsthe direction of the opposite side of the bottom surface B. Favorably,the curvature radiuses of the first top portion 611 and second topportion 621 are in a range between 10 mm and 1000 mm. In otherembodiments, as shown in FIG. 6B, which is a schematic diagram ofanother embodiment of the display device in FIG. 6A, oppositely, thecurved structure of the first top portion 611 a and second top portion621 a may be curved towards the direction of the side of the bottomsurface B.

Since the first top portion 611 (611 a), the first sidewall portion 612(612 a), the second top portion 621 (621 a) and the second sidewallportion 622 (622 a) also collectively form the first bent portion 613and the second bent portion 623, the anti-water/oxygen effect also canbe achieved and a narrow border can be provided.

Summarily, in the display device of this invention, the first bentportion is formed between the first top portion and the first sidewallportion and the second bent portion is formed between the second topportion and the second sidewall portion, and that is, the first bentportion and the second bent portion collectively form the bentstructure. Thereby, the path of the water/oxygen of the environmentpermeating the accommodating space can be elongated, and that is, thetime of the water/oxygen of the environment contacting the displayelement can be delayed, so as to prevent the display element from beingaffected by the water/oxygen and damaged and thus to achieve theanti-water/oxygen effect. Besides, through the design of the first bentportion and the second bent portion, the width of the border of thedisplay device can be reduced and the effect of a narrow border regioncan be provided.

Furthermore, through the design of the first bent portion and the secondbent portion, the anti-water/oxygen effect of a certain degree can beachieved when the packaging material is just disposed in theaccommodating space and corresponding to the first sidewall portion andthe second sidewall portion. Therefore, the packaging material can besaved.

Although the invention has been described with reference to specificembodiments, this description is not meant to be construed in a limitingsense. Various modifications of the disclosed embodiments, as well asalternative embodiments, will be apparent to persons skilled in the art.It is, therefore, contemplated that the appended claims will cover allmodifications that fall within the true scope of the invention.

What is claimed is:
 1. A display device, comprising: a first substrateincluding: a first top portion; a first sidewall portion; and a firstbent portion extended from an edge of the first top portion and disposedbetween and connecting the first top portion and the first sidewallportion; a second substrate separated from the first substrate by apredetermined distance to form an accommodating space and including: asecond top portion disposed corresponding to the first top portion; asecond sidewall portion; and a second bent portion extended from an edgeof the second top portion and disposed between and connecting the secondtop portion and the second sidewall portion; a display element disposedin the accommodating space; and a packaging material disposed in theaccommodating space and corresponding to the first sidewall portion andthe second sidewall portion.
 2. The display device as recited in claim1, wherein the packaging material is disposed around the displayelement.
 3. The display device as recited in claim 1, wherein the firstsubstrate further includes a first extension portion connected to thefirst sidewall portion, the second substrate further includes a secondextension portion connected to the second sidewall portion and disposedcorresponding to the first extension portion, and the first extensionportion and the second extension portion are extended along a directionparallel to the first top portion.
 4. The display device as recited inclaim 3, wherein the first extension portion is extended to another edgeof the first top portion, and the second extension portion is extendedto another edge of the second top potion.
 5. The display device asrecited in claim 4, wherein the length of the second sidewall portion isin a range between 1 mm and 20 mm.
 6. The display device as recited inclaim 4, further comprising: a third bent portion extended from thefirst sidewall portion and disposed between the first sidewall portionand the first extension portion; and a fourth bent portion extended fromthe second sidewall portion and disposed between the second sidewallportion and the second extension portion.
 7. The display device asrecited in claim 6, wherein the packaging material includes a firstpackaging material and a second packaging material, the extensibility ofthe first packaging material is greater than that of the secondpackaging material, the first packaging material is disposed in theaccommodating space and corresponding to the first bent portion, thefirst sidewall portion, the third bent portion, the second bent portion,the second sidewall portion and the fourth bent portion, and the secondpackaging material is disposed in the accommodating space andcorresponding to the first extension portion and the second extensionportion.
 8. The display device as recited in claim 3, furthercomprising: a third bent portion extended from the first sidewallportion; a fourth bent portion extended from the second sidewallportion; a fifth bent portion extended from the third bent portion; asixth bent portion extended from the fourth bent portion; and whereinthe third bent portion and the fifth bent portion are disposed betweenthe first sidewall portion and the first extension portion, and thefourth bent portion and the sixth bent portion are disposed between thesecond sidewall portion and the second extension portion.
 9. The displaydevice as recited in claim 1, wherein the first top portion and thesecond top portion are curved structures.
 10. The display device asrecited in claim 9, wherein the curvature radiuses of the first topportion and second top portion are in a range between 10 mm and 1000 mm.